Cope-pattern.



No. 678,256. Patented July 9, IBM. J. G. JOHNSTON.

CUPE PATTERN.

(Application filed Dec. 13, 1900.)

Z'Sheets-Shoet l.

(No Model.)

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No. 678,256. Patented July 9, l9 0l.

J. a. JOHNSTON.

COPE PATTERN.

(Application filed Dec. 13, 1900.) (No Model.) 2 Shaats-$heet 2.

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-rTEn- STATES PATENT OrFicE.

JOSEPH G. JOHNSTON, OF DETROIT, MICHIGAN, ASSIGNOR TO THE AMERI- CAN OAR& FOUNDRY COMPANY, OF ST. LOUIS, MISSOURI.

COPE- PATTERN.

' SPECIFICATION forming part of Letters Patent No. 678,256, dated July9, 1901. Application filed December 13, 1900- Serial No. 39,691. (Nomodel.)

To all whom it may concern: To attain the objects to which I have aboveBe it known that I, JOSEPH G. JOHNSTON, referred, I make use of theconstruction illus a citizen of the United States, residing at thetrated in the accompanying drawings, wherecity of Detroit, county ofWayne, State of -inlikecharactersdesignatelike partsthrough- 55Michigan, have invented a certain new and out the several views.

useful Improvement in Cope- Patterns, of p In the drawings, M representsthe chillwhich the following is a full, clear, and exact ring, N theskeleton flask, and O the pattern, description, such as will enableothers skilled all of which parts are employed to carry out in the artto which it appertains to make and my present invention. This chill-ringM has 60 use the same, reference being had to the aca slightly-conicalinner face m, which blends companying drawings, forming part of thisinto an enlarged recess m, formed in one edge specification, in which ofsaid ring, said face and recess being of a Figure l is a top plan Viewof my improved shape to conform to the tread and part of thecope-pattern, chill-ring, and flask. Fig. 2 is flange, respectively, andconsequently the 65 a vertical sectional view of the same, taken onthroat of the car-wheel. The outer face of line 2 2, Fig. 1, the sameillustrating a sand this chill-ring M is provided with. trunnions matrixtherein before the parts have been m, by'which the same may be handledby subjected to pressure. Fig. 3 is a vertical the bail of a hoist orcrane, and is also prosectional View of a completed mold, showing videdwith lugs or cars m and m, the former 70 the relative position of myimproved cope, being provided with holes for receiving bolts flask, andchill-ring to a drag-flask. Fig. 4 or securing devices m for attachmentto the is a side elevational view of the same, showflask N, while thelatter is provided with pins ing the manner in which the parts areclamped m, which engage in one operation perforated together; and Fig. 5is a detail elevational lugs or ears 0 formed on the pattern, and in 75view. another operation perforated lugs or ears This invention relatesto a new and useful formed on the drag-flask L, which latteropimprovement in a cope-pattern, flask, and 'eration occurs when a mold.is formed ready chill-ring, the same being designed particuto receivemolten metal by arranging and larly for use in the formation of the sandmaclamping together the drag-flask L, chill-ring 8o trix for the flaskof the cope side of a mold M, and the cope-flask N, as is illustrated infor casting car-wheels. Figs. 3 and 4.

One object of my present invention is to While I have illustrated andreferred in produce a pattern, flask, and chill-ring of the thisapplication to the drag-flask L, it forms character described which iseffective, comno part of this invention, as it is the subject- 85paratively light, strong, and susceptible of matterofaseparateapplication seriallynumbeing handled and manipulated by a moldbered39,693, to which I have previously reing-maohine such as is illustratedand deferred,the same being illustrated and briefly scribed in anapplication filed by me July 9, described here only for the purpose ofmak- 1900, serially numbered 22,987. ing the construction and use ofmyimproved o 40 Another object is to form a cope side or cope pattern,flask, and chill -ring more flask of a mold with a sand matrix whichwill clearly understood. be complementary to adrag-flask and itssand Thepattern 0 consists of a face-plate 0, matrix such as shown and describedin an properly shaped to conform to one face of a application filed byme December 13, 1900, car-wheel, in the center of which is arranged 5 5said application being serially ,numbered a removable core-print 0. Theface-plate is 39,693. strengthened on its lower side by suitable Withthese objects in view the invention strengthening webs or ribs 0 and hasa botconsists in the novel construction, arrangetom plate 0 forming areduced portion for ment, and combination of the several parts offitting in an opening of a turn-table when 100 my device, allas willhereinafterbe described, practicing my invention in connection with andafterward pointed out in the claims. the molding-machine forming thesubjectmatter of application serially numbered 22,987, to which I havebefore referred.

0* indicates spring-seats projecting laterally from the pattern, four ofsuch seats being preferably arranged equidistantly around the same.Springs 0 are arranged in these seats and sustain an inverted cup or cappiece 0, serving as a follower and guide and also supporting thechill-riug'M, as will hereinafter be described.

Bolts 0 passing through the cap-pieces and spring-seats, hold thesprings u'nder compression and limit the upward movement of the caps. Inaddition to the springs, the copepattern is provided with lugs or ears 0and in these are formed holes which receive the pins m of-thechill-ring. The cope pattern is further provided with stops 0*, whichmeet the lower face of the chill-ring when said cope pattern,chill-ring, and flaskare being pressed, as will hereinafter beexplained, making a uniform distance of travel and limiting the movementof the parts.

The cope-flask N consists of a skeleton frame which is bolted orotherwise secured to the chill-ring M, and, as shown in Figs. 1 and 2,this cope-flask is made up of a plurality of three concentric rings n,connected by radially-disposed ribs or barsn. The lower edges of the twoinnermost of these concentric rings and radial ribs or bars are formedbeveled or knife-liketo enable the sand to pack uniformly therearound.

The skeleton cope-flask is so constructed that it conforms to thecontour of the pattern, both as to the sharp edges of the bars next thepattern and their upper edges.

When it is desired to make a sand matrix for my improved flask andchill-ring, the two are placed upon the pattern 0, as illustrated inFig. 2. Sand is then poured through the skeleton flask onto the faceplate 0, after which the sand is distributed over the pattern by a sweep(not shown) of such shape that it will regulate the depth of sandrequired on the different parts of the pattern, so that all the moldswill contain a uniform quantity of sand, it being understood that theparts are previously arranged in one of the openings in the turn-tableof the molding-machine, such as shown in application serially numbered22,987, to which I have before referred. The turn-table being revolveduntil the flask, chill-ring, and pattern register with the press issubjected to pressure by the press, which pressure forces the flask andchill-ring and the pattern toward each other and compresses the sandcontained within the parts until further movement of the parts towardeach other is arrested by the contact of the lugs 0 on the pattern withthe under face of the chill-ring. Springs 0 being now under compressionwill upon the release of pressure force the chillring and its carriedflask away from the pattern, carrying with them the pressed-sand matrix.The chill-ring, flask, and its carried sand matrix are now removed fromthe pattern and are ready to be placed over and clamped to thedrag-flask L and its carried sand matrix, as shown in Figs. 3 and 4,preparatory to receiving the charge of molten metal, it being understoodthat all necessary cores were placed in the drag portion of the Havingthus described my invention, what I claim, and desire to secure byLetters Patent, is-

1. The combination with a pattern provided with pockets at points aroundits periphery, of springs arranged in said pockets for supporting achill-ring, caps for the springs, and bolts passing through the caps andthe bottom walls of the pockets, substantially as described.

2. The combination withacircular pattern, of recessed lugs 0 extendinglaterally beyond the periphery of said pattern, said lugs being arrangedon the bottom portion of the pattern, springs arranged in the recessesof said lugs for supporting a chill-ring, and stops on the pattern forengaging the chill-ring when the springs are compressed, substantiallyas described.

3. Theherein-described pattern comprising a face-place, a bottom wall,ribs connecting said face-plate and bottom wall, recessed lugs extendinglaterally from the pattern, and springs arranged in the recesses in saidlugs; substantially as described.

4. The herein-described pattern whose body portion comprises aface-plate, side walls and bottom wall, interiorly-arrangedstrengthening-ribs, laterally-projecting recessed lugs which extendbeyond the periphery of the body portion of the pattern, and springs inthe recesses in said lugs for supporting the chill-ring; substantiallyas described.

In testimony whereof I hereunto allix my signature, in the presence oftwo witnesses, this 4th day of December, 1900.

JOSEPH G. JOHNSTON.

\Vitnesses:

DAVID W. HAWKSWORTH, JOHN STEVENSON, Jr.

